Proper use of continue;

[Lionel]

Why would the below display a blank page when using continue;?
I am trying to tell it to do nothing if it's a member, go ahead and open the script

<?php
chdir('/var/www/forums');
define('NO_REGISTER_GLOBALS', 1);
$phrasegroups = array();
$actiontemplates = array('lostpw' => array('lostpw'));
require_once('./global.php');
require_once('./includes/functions_login.php');
if ($bbuserinfo['userid'])
{
continue;
}
else
{
print_no_permission();
}
?>